Alleviating CTAC and Flu combined pollution damage in Chlorella vulgaris by exogenous nitric oxide

作者：Li, Qi; Liang, Zhijie; Ge, Fei^*; Xu, Yin; Yang, Liang; Zeng, Hui

来源：Chemosphere, 2014, 96: 39-45.

DOI：10.1016/j.chemosphere.2013.07.012

• Exogenous nitric oxide
• Joint toxicity
• Antioxidant enzymes
• Algae

This study investigates the effect of sodium nitroprussiate (SNP), an exogenous NO-donor, on the joint toxicity of binary mixtures of cetyltrimethylammonium chloride (CTAC) and fluoranthene (Flu) (CTAC/Flu), which are representatives for surfactants and polycyclic aromatic hydrocarbons (PAHs) respectively, in a unicellular green alga Chlorella vulgaris (C. vulgaris). The results showed that the addition of low SNP (20 mu M) alleviated the CTAC/Flu combined pollution damage in C. vulgaris. Supplement of low SNP significantly increased the algae biomass, chlorophyll content, soluble protein content and the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) as compared to CTAC/Flu treatment alone. SNP also reduced the content of malondialdehyde (MDA) and the reactive oxygen species (ROS), as compared with CTAC/Flu treated alone. On the contrary, the above phenomena were reversed when high concentration of SNP (100 mu M) was added. Our study indicated that the damage of the joint action of surfactants and PAHs on hydrobios can be alleviated through protecting against oxidant substances and increasing the activity of antioxidant enzymes with an exogenous supply of NO in certain concentration range.

• 出版日期2014-2
• 单位湘潭大学